<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="uname" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="uage" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="usex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click.prevent="addBtn">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in list" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.sex }}</td>
          <td>
            <button @click="delBtn(item.id)">删除</button>
            <button @click="editBtn(item)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      list: [{ id: 1, name: "小王", age: 18, sex: "男" }],
      uname: "",
      uage: 0,
      usex: "",
      num: 1,
      flag: false,
    };
  },
  methods: {
    addBtn() {
      if (this.uname.trim().length === 0 || this.uage <= 0 || this.usex === "")
        return alert("信息不完整");
      if (this.flag) {
        let i = this.list.findIndex((item) => item.id === this.num);
        this.$set(this.list, i, {
          name: this.uname,
          age: this.uage,
          sex: this.usex,
        });
        this.flag = false;
      } else {
        this.list.push({
          id: +new Date(),
          name: this.uname,
          age: this.uage,
          sex: this.usex,
        });
        
      }

      this.uname = "";
      this.uage = 0;
      this.usex = "";
    },
    delBtn(id) {
      this.list = this.list.filter((item) => item.id !== id);
    },
    editBtn(item) {
      this.uname = item.name;
      this.uage = item.age;
      this.usex = item.sex;
      this.flag = item;
      this.num = item.id;
    },
  },
};
</script>